Advika were the first ethical brand of undies I tried. I've since ordered more, because they're awesome. They're made in Canada out of a fabric blend of organic cotton and bamboo, and they are seriously comfortable. Underwear from this Etsy shop are about $15/pair, or 3 for $38.

Brook There

This brand out of Portland Maine has been making sustainable underwear since 2007. They use U.S.-milled organic cotton and all of their items are hand-made in the U.S.A. Panties start at $32.

Daisy & Elizabeth

Looking for some really wild & fundies? Daisy & Elizabeth have some of the most eclectic undergarments I've come across. Like, if someone at Burning Man didn't want to be totally naked, she'd wear these. The designers are a pair of friends inspired by cowboys and hippies. These pieces aren't cheap (panties range from $50 - $175) but they are definitely intended be seen and enjoyed.

Good & Fair

Good & Fair offer some truly ethical undies. From the cotton (organically grown by a fair trade farmers cooperative), to the factory (fair trade certified supply chain), you can feel good about sliding these over your hiney. And you will, because they are crazy comfortable. Your wallet will feel good too because they are only $12 a pair. (They make boxers for guys too! Only $14.)

Larkspur

Larkspur originated as an Etsy shop. They are committed to using the most eco-friendly fabrics available to manufacture their luxurious, comfortable lingerie. Panties start at $22. If you're looking for something that's a little bit more than just a basic pair of cotton undies, this is a good place to start!

Me Undies

The MeUndies brand is focused on providing affordable, comfortable underwear without compromising ethics or values. That means they use sustainable materials and eco-friendly manufacturing methods. Briefs start at $16. Click here for 20% off.

Naja

If you like ladies, you might like Naja. The underwear brand was founded by actress Gina Rodriguez, of television's "Jane the Virgin." Per the website: "Naja’s garment factory primarily employs single mothers or female heads of households where they are paid above market wages with healthcare benefits. We chose to aid single mothers, because many have to choose between working and caring for their children. At Naja, we’ve implemented flexible work policies that make it easier for women to balance work and childcare. Every child of a Naja garment worker receives books, school supplies, uniforms and all school meals paid by Naja." That's a brand I'm happy to support. They even have a line of eco-friendly underwear made from recycled plastic bottles. Naja has some really cute designs, and panties start as low as $18/pair. Click here for $15 off your first order!

PACT

If you're looking for wearable every day cotton panties, but want more style choices, check out PACT. They have four options of womens cuts, and loads of fun patterns to choose from. You can snag a 2-pack of underwear for just $23. No sweatshops. No child labor. No toxic pesticides. Non-GMO Organic Cotton. What's not to love?

Sandmaiden Sleepwear

Sandmaiden Sleepwear is another Etsy brand that uses all natural fibers like organic cotton to produce beautiful lingerie and loungewear. Their designs are a little bit pricier ($35 for a pair of bamboo panties,) but the designs really are lovely. Check them out if you want to treat yourself and your special bits to a little treat.

Skin

Skin makes basic cotton underwear for grown ups. But not for grannies. They use organic pima cotton to make them. And they make other clothes, too. If you want something simple but not boring, organic, and wearable for every day, check them out. Organic panties range from $24-$26.

Svala

Svala is an American brand from an Australian designer with an Icelandic name. Yea. They make cute and sexy underwear using sustainable fabrics like organic cotton and bamboo, and they use ethical suppliers whenever possible. Panties are $25 - $35.